| 1. | There are two pumps to fill a tank with water. First pump can fill the empty tank in 8 hours, while the second in 10 hours. If both the pumps are opened at the same time and kept open for 4 hours, the part of tank that will be filled up is ? | |
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9/10
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1/10
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2/5
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1/5
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Report Question| 2. | A tank can be filled by two pipes in 20 minutes and 30 minutes respectively. When the tank was empty, the two pipes were opened. After some time, the first pipe was stopped and the tank was filled in 18 minutes. After how much time of the start was the first pipe stopped ? | |
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5 minutes
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8 minutes
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10 minutes
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12 minutes
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| 3. | Three pipes A, B and C can fill a tank in 6 hours. After working together for 2 hours, C is closed and A and B fill the tank in 8 hours. The time (in hours) in which the tank can be filled by pipe C alone is ? | |
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10
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12
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8
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9
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| 4. | Two pipes A and B can fill a water tank in 20 and 24 minutes respectively and a third pipe C can empty at the rate of 3 gallons per minute. If A, B and C are opened together to fill the tank in 15 minutes, the capacity (in gallons) of the tank is ? | |
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180
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150
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120
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60
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| 5. | A leak in the bottom of a tank can empty the full tank in 6 hours. An inlet pipe fills water at the rate of 4 litres a minute. When the tank is full, the inlet is opened and due to the leak the tank is empty in 8 hours. Find the capacity of the tank ? | |
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5760 litres
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96 litres
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10 litres
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24 litres
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| 6. | A tank has two pipes. The first pipe can fill it in 4 hours and the second can empty it in 16 hours. If two pipes be opened together at a time, then the tank will be filled in ? | |
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5 and 1/2 hours
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10 hours
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6 hours
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5 and 1/3 hours
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| 7. | Two pipes A and B can fill a cistern in 37 and 1/2 minutes and 45 minutes respectively. Both pipes are opened. The cistern will be filled just in half an hour, if the pipe B is turned off after ? | |
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15 minutes
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10 minutes
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5 minutes
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9 minutes
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| 8. | A cistern has two pipes. One can fill it with water in 8 hours and other can empty it in 5 hours. In how many hours will the cistern be emptied if both the pipes are opened together when 3/4 of the cistern is already full of water ? | |
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13 and 1/3 hours
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10 hours
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6 hours
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3 and 1/3 hours
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| 9. | A tank can be filled by pipe A in 2 hours and pipe B in 6 hours. At 10 A.M. pipe A was opened. At what time will the tank be filled if pipe B is opened at 11 A.M ? | |
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12.45 A.M.
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5 P.M.
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11.45 A.M.
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12 P.M.
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| 10. | Three taps A, B, C can fill an overhead tank in 4, 6 and 12 hours respectively. How long would the three taps take to fill the tank if all of them are opened together ? | |
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2 hrs.
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4 hrs.
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3 hrs.
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5 hrs.
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